Herbicide distribution in soils of a riparian forest and neighboring sugar cane field

Riparian forests are protected by Brazilian law to preserve rivers and their margins. A sugar cane field adjacent to a strip of young riparian forest bordering an older riparian forest along a stream was used to study the riparian forest as a buffer zone to prevent pesticides pollution. Concentratio...

Full description

Saved in:
Bibliographic Details
Published in:Geoderma 2010-09, Vol.158 (3), p.392-397
Main Authors: Bicalho, S.T.T., Langenbach, T., Rodrigues, R.R., Correia, F.V., Hagler, A.N., Matallo, M.B., Luchini, L.C.
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Air pollution
Biological and medical sciences
Canopies
Diuron
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Exact sciences and technology
Freshwater
Fundamental and applied biological sciences. Psychology
Herbicides
Hexazinone
Pesticide volatilization
Pesticides
Phytoremediation
Pollution, environment geology
Riparian forest
Riparian forests
Soils
Sugar cane
Surficial geology
Tebuthiuron
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Riparian forests are protected by Brazilian law to preserve rivers and their margins. A sugar cane field adjacent to a strip of young riparian forest bordering an older riparian forest along a stream was used to study the riparian forest as a buffer zone to prevent pesticides pollution. Concentrations of the herbicides diuron, hexazinone and tebuthiuron were determined in different soil layers of a Red Yellow Oxisol during 2003 and 2004. The determination was done by High Performance Liquid Chromatography with reverse phase C-18 column, through two mobile phases. Diuron and hexazinone concentration diminished between the sugar cane and riparian forest as buffer strip demonstrating a protective effect. However, tebuthiuron had about four times higher concentrations in the old riparian forest compared to the other areas. Concentrations were higher in the surface and decreased in deeper soil layers in the old riparian forest suggesting that this herbicide probably was introduced by air pollution. This pesticide concentrated in the canopy could be washed by rain to the soil adjacent to the stream. Our data suggest that climate conditions were responsible for enhanced volatilization exposing the old riparian forest to more air pollution that was captured by the higher canopy. ►Riparian forests may function as buffer strips retaining pesticides. ►Old riparian forest canopy could function as a trap introducing pesticide in the soil. ►Introducing or retaining pesticides in the soil depended on climate factors that regulate volatilization.
ISSN:0016-7061
1872-6259
DOI:10.1016/j.geoderma.2010.06.008